I need a new wheel cylinder in the right rear drum but I need to know if my brakes are 9 or 10 inch.
The easy way would be have someone just tell me what size or tell me what i need to measure to find out. thanks.

 

take a pic of the rear and post it and we may be able to tell you from that. do you have anti-lock brakes? ...Tj

 

no abs 91 briarwood 8.25c. I dont have the abilaty to post pics at the moment...

 

am i looking for the diameter of the drum??

 

Inner Diameter of the drum, if you still feel uncomfortable take wheel cylinder off and take it up to the parts store with you and have them show you both, match up to the one you need.

 

could do that...they cheap enough i could buy both too and return the not need one. If I take out wheel cylinder first i got no way of getting to parts store.

 

Most likely a 9 inch, I think 10's came on towing package and police vehicles...Tj

 

mine may have fac tow package. its got hitch and trans cooler...

 

also not a 100% sure about this but IIRC the 9 inch have 2 1/2" wide shoes adn the 10 inch have 2" wide shoes

 

Does the drum have fins? My 10" have fins and I think the 9" don't

Someone correct me if I am wrong.....

 

Mine are 9's and dont have the fins...Tj

 

I was looking for someone to post that, or I was. yes the 10" drums have fins on the outside of it and the 9" are smooth on the outside.

Also I have 9" with the towing package so the 10" where something else... maybe upcountry package?

 

just measure the inside of the drum
and you will have your answer

 

my dana44 is 10 inch
i think both the d35 and 8.25 are 9 inch. d35 is for sure.

 

it was 9"